SNR S2989G-24TX-POE — настройка BPDU Tunnel для сетевых услуг уровня 2 [104/553]

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S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

bpdu-tunnel {stp|gvrp|lacp|dot1x}

no bpdu-tunnel {stp|gvrp|lacp|dot1x}

Enable the port to support the

tunnel, the no command disables

the function.

2.9.3

Examples of bpdu-tunnel

Special lines are used in a service provider network to build user-specific Layer 2

networks. As a result, a user network is broken down into parts located at different sides of

the service provider network. As shown in Figure, User A has two devices (CE 1 and CE 2)

and both devices belong to the same VLAN. User’s network is divided into network 1 and

network 2, which are connected by the service provider network. When Layer 2 protocol

packets cannot implement the passthrough across the service provider network, the

user’s network cannot process independent Layer 2 protocol calculation (for example,

spanning tree calculation), so they affect each other.

Figure 2-15 BPDU Tunnel application environment

With BPDU Tunnel, Layer 2 protocol packets from user’s networks can be passed

through over the service provider network in the following work flow:

1. After receiving a Layer 2 protocol packet from network 1 of user A, PE 1 in the service

provider network encapsulates the packet, replaces its destination MAC address with a

specific multicast MAC address, and then forwards the packet in the service provider

network.

2. The encapsulated Layer 2 protocol packet (called BPDU Tunnel packet) is forwarded to

PE 2 at the other end of the service provider network, which de-encapsulates the packet,

restores the original destination MAC address of the packet, and then sends the packet to

network 2 of user A.

bpdu-tunnel configuration of edge switches PE1 and PE2 in the following:

PE1 configuration:

PE1(config)# bpdu-tunnel dmac 01-02-03-04-05-06